added a provider for VarDumper

composer.json

@@ -42,6 +42,7 @@
         "symfony/translation": "~2.7",
         "symfony/twig-bridge": "~2.7",
         "symfony/validator": "~2.7",
+        "symfony/var-dumper": "~2.7",
         "twig/twig": ">=1.8.0,<2.0-dev",
         "doctrine/dbal": "~2.2",
         "swiftmailer/swiftmailer": "5.*",

doc/changelog.rst

@@ -4,6 +4,7 @@ Changelog
 2.0.0 (2015-XX-XX)
 ------------------
 
+* added support for the Symfony VarDumper Component
 * [BC BREAK] The app variable exposed in Twig is now an AppVariable instance
 * [BC BREAK] CSRF has been moved to a standalone provider (``form.secret`` is not available anymore)
 * added support for the Symfony HttpFoundation Twig bridge extension

doc/providers/index.rst

@@ -19,3 +19,4 @@ Silex
     remember_me
     serializer
     service_controller
+    var-dumper

doc/providers/var-dumper.rst

+VarDumperServiceProvider
+========================
+
+The *VarDumperServiceProvider* provides a mechanism that allows exploring then
+dumping any PHP variable.
+
+Parameters
+----------
+
+* **var_dumper.dump_destination**: A stream URL where dumps should be written
+  to (defaults to ``null``).
+
+Services
+--------
+
+* n/a
+
+Registering
+-----------
+
+.. code-block:: php
+
+    $app->register(new Silex\Provider\VarDumperServiceProvider());
+
+.. note::
+
+    Add the Symfony VarDumper Component as a dependency:
+
+    .. code-block:: bash
+
+        composer require symfony/var-dumper
+
+Usage
+-----
+
+Adding the VarDumper component as a Composer dependency gives you access to the
+``dump()`` PHP function anywhere in your code.
+
+Ig you are using Twig, it also provides a ``dump()`` Twig function and a
+``dump`` Twig tag.
+
+The VarDumperServiceProvider is also useful when used with the Silex
+WebProfiler as the dumps are made available in the web debug toolbar and in the
+web profiler.

src/Silex/Provider/TwigServiceProvider.php

@@ -15,6 +15,7 @@ use Pimple\Container;
 use Pimple\ServiceProviderInterface;
 use Symfony\Bridge\Twig\AppVariable;
 use Symfony\Bridge\Twig\Extension\AssetExtension;
+use Symfony\Bridge\Twig\Extension\DumpExtension;
 use Symfony\Bridge\Twig\Extension\RoutingExtension;
 use Symfony\Bridge\Twig\Extension\TranslationExtension;
 use Symfony\Bridge\Twig\Extension\FormExtension;
@@ -103,6 +104,10 @@ class TwigServiceProvider implements ServiceProviderInterface
                     $path = dirname($reflected->getFileName()).'/../Resources/views/Form';
                     $app['twig.loader']->addLoader(new \Twig_Loader_Filesystem($path));
                 }
+
+                if (isset($app['var_dumper.cloner'])) {
+                    $twig->addExtension(new DumpExtension($app['var_dumper.cloner']));
+                }
             }
 
             return $twig;

src/Silex/Provider/VarDumperServiceProvider.php

+<?php
+
+/*
+ * This file is part of the Silex framework.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Silex\Provider;
+
+use Pimple\Container;
+use Pimple\ServiceProviderInterface;
+use Silex\Application;
+use Silex\Api\BootableProviderInterface;
+use Symfony\Component\VarDumper\VarDumper;
+use Symfony\Component\VarDumper\Cloner\VarCloner;
+use Symfony\Component\VarDumper\Dumper\CliDumper;
+
+/**
+ * Symfony Var Dumper component Provider.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class VarDumperServiceProvider implements ServiceProviderInterface, BootableProviderInterface
+{
+    public function register(Container $app)
+    {
+        $app['var_dumper.cli_dumper'] = function ($app) {
+            return new CliDumper($app['var_dumper.dump_destination'], $app['charset']);
+        };
+
+        $app['var_dumper.cloner'] = function ($app) {
+            return new VarCloner();
+        };
+
+        $app['var_dumper.dump_destination'] = null;
+    }
+
+    public function boot(Application $app)
+    {
+        if (!$app['debug']) {
+            return;
+        }
+
+        // This code is here to lazy load the dump stack. This default
+        // configuration for CLI mode is overridden in HTTP mode on
+        // 'kernel.request' event
+        VarDumper::setHandler(function ($var) use ($app) {
+            VarDumper::setHandler($handler = function ($var) use ($app) {
+                $app['var_dumper.cli_dumper']->dump($app['var_dumper.cloner']->cloneVar($var));
+            });
+            $handler($var);
+        });
+    }
+}